Chabad.org — English translation + Rashi
Torah Temimah points to Menachos 9b.
E-Daf.com — Menachos 9b
HebrewBooks / Shas PDF
English: “And the remainder from the minchah” — excluding a minchah that itself was short, or whose kometz was short, or of which none of its frankincense was burned.
Miyut of defective minchah remainders — remainders are eaten only when the minchah, kometz, and levonah were all intact.
Shirayim are eaten only when the minchah, its kometz, and its levonah were all complete. The verse’s reference to “the remainder from the minchah” excludes cases in which the original flour was short, the handful was incomplete, or no frankincense was burned at all.